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5.4 Cross-section survey

5.4.1 After an excavation cross-section is formed,cross-section survey shall be made.

5.4.2 The interval of the cross-section survey shall comply with the requirements in Table 5.4.2.

Table 5.4.2 Invertal of cross-section survey V3NAUpJn58TA0/s22IBjwn2y9kmOLuQLc96gwMllyv/NhcfQ47le7eEXaHlqhwnV

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